WO2023034469A1 - Agent de traitement de l'eau exempt de phosphore pour des applications de blanchisserie - Google Patents

Agent de traitement de l'eau exempt de phosphore pour des applications de blanchisserie Download PDF

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Publication number
WO2023034469A1
WO2023034469A1 PCT/US2022/042288 US2022042288W WO2023034469A1 WO 2023034469 A1 WO2023034469 A1 WO 2023034469A1 US 2022042288 W US2022042288 W US 2022042288W WO 2023034469 A1 WO2023034469 A1 WO 2023034469A1
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WIPO (PCT)
Prior art keywords
laundry
composition
water
chelant
phosphorus
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PCT/US2022/042288
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English (en)
Inventor
Bjoern PAUTSCH
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Ecolab Usa Inc.
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Application filed by Ecolab Usa Inc. filed Critical Ecolab Usa Inc.
Priority to EP22773357.3A priority Critical patent/EP4367212A1/fr
Publication of WO2023034469A1 publication Critical patent/WO2023034469A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
    • C11D3/3765—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in liquid compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2086—Hydroxy carboxylic acids-salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/265—Carboxylic acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/12—Soft surfaces, e.g. textile

Definitions

  • Embodiments disclosed relate to methods and compositions for enhanced laundering through use of phosphorus-free water treatment agents to decrease water hardness and heavy metals concentrations for improved textile whiteness.
  • methods and compositions for controlling water hardness and transition metal contaminants in water utilized in laundry applications are provided.
  • non-phosphorous water treatment agents are used as boosters for laundry applications, including professional laundry in need of the excellent textile whiteness.
  • the residual components of the alkaline detergents remaining in or on the laundered item can result in decreased whiteness of the fabric, fabric damage or even skin irritation by the wearer of the washed fabric. This is particularly a problem with towels, sheets and garments where fabric whiteness is of great importance.
  • metals including heavy metals can enter a laundry process from various sources, including water supplied to the washer, direct steam injection heated washers, salt content in new linens, and soil or stains (e.g. rust) providing metal content.
  • Iron can enter the water at the source or be picked up from corroding (or lines in various states of corrosion) water lines and tanks. Iron may be present in water sources in a soluble colorless form called ferrous iron. When exposed to air, ferrous iron rapidly converts to insoluble ferric iron, which can vary in color from yellow to reddish brown. If not properly removed, iron and other metals can cause permanent yellowing of fabrics and loss of fabric life due to tensile strength loss. Metal content can further result in detergent inactivation and/or inhibition, accelerated loss of oxidizing chemistries used in a laundry process, shading due to deposition of metals, as well as shading due to optical brightener modification, and still other detrimental laundry effects.
  • a further object is to provide a non-phosphorous laundry booster composition for the control of water hardness and metals while improving laundry performance.
  • a further object is to provide methods and phosphorous-free booster compositions for improving laundry whiteness.
  • a still further object is to provide methods and phosphorous-free booster compositions that provide high quality wash water in the laundry application that has low water hardness and controls heavy metals for improved textile whiteness.
  • a still further object is to provide methods for laundering wherein the wastewater form the process do not include phosphorus.
  • methods for treating laundry comprise: contacting the laundry with a laundry booster composition comprising a gluconate chelant, a carboxylate polymer and water; wherein the laundry booster composition is phosphorus-free, controls water hardness and metal contaminants throughout the laundry process, and provides enhanced whiteness of the treated laundry, and wherein the laundry booster compositions follows an initial wash process where the laundry and/or water supplied to the washer is hard water and/or contaminated with metals.
  • the methods further include a rinse cycle following the initial wash process and the laundry booster step.
  • the wastewater from the laundry does not contain phosphorus.
  • the dosing of the laundry booster composition can be provided at a rate of: (a) about 0.5 fluid ounces to about 30 fluid ounces (about 14.79 mL to about 887.1 mL), (b) about 3 fluid ounces to about 30 fluid ounces (about 88.71 mL to about 887.1 mL) per 100 pounds of linen, or (c) at a rate to control at least 0.1 ppm transition metals in the laundry process.
  • the dosing of the laundry booster composition can be provided at a rate of about 0.5 to about 5 grams/L of solution of the water conditioning composition, and wherein the composition comprises from about 0.08 to about 0.8 grams/L gluconate chelant.
  • the contacting of the laundry additive composition can be: before a bleaching and/or oxidizing step in the laundry process; and/or simultaneous with an alkaline detergent wash step in the laundry process.
  • the liquid laundry booster compositions comprise: from about 15 wt-% to about 40 wt-% of a gluconate chelant; from about 25 wt-% to about 50 wt-% of a carboxylate polymer; and from about 20 wt-% to about 50 wt-% of water, wherein the composition is phosphorus-free.
  • the gluconate chelant is sodium gluconate or gluconic acid.
  • the carboxylate polymer is a polyacrylate polymer, a polyacrylic acid, a polymaleic acid, salt thereof or combination thereof.
  • the compositions can further comprise an aminocarboxylate chelant.
  • the gluconate chelant comprises from about 15 wt-% to about 30 wt-% of the composition, wherein the carboxylate polymer comprises from about 30 wt-% to about 50 wt-% of the composition, and water comprises from about 20 wt-% to about 40 wt-% of the composition.
  • the composition is free of surfactants, phosphorus, and/or di ethylenetriaminepentaacetic acid.
  • FIG. 1 shows the results of a raw material screening using the Hempshire test to evaluate calcium complexing capacity of components used in detergent compositions.
  • FIGS. 2-4 show the results of comparative calcium complexing using the Hempshire test comparing evaluated formulations to various commercial controls.
  • FIG. 5 shows a graph with the comparative iron complexation capacity of evaluated sequestering agents.
  • FIG. 6 shows a graph depicting the sequestering power of Fe 3+ and Cu 2+ .
  • Embodiments disclosed herein relate to methods and laundry booster compositions for controlling the damaging effects of water hardness and metals entering a laundry process while providing desired fabric whitening.
  • the methods and compositions have many advantages over conventional laundry applications, in that water containing metals, such as iron, copper and manganese, along with water hardness ions, can be addressed throughout all phases of the laundry process due to the formulation of the laundry booster compositions.
  • the laundry booster compositions provide soil suspension and removal (such as on cotton fabrics), iron and other metal control, and whitening while also resulting in wastewater that is free of phosphorus.
  • the term "about,” as used herein, refers to variation in the numerical quantity that can occur, for example, through typical measuring and liquid handling procedures used for making concentrates or use solutions in the real world; through inadvertent error in these procedures; through differences in the manufacture, source, or purity of the ingredients used to make the compositions or carry out the methods; and the like.
  • the term “about” also encompasses amounts that differ due to different equilibrium conditions for a composition resulting from a particular initial mixture. Whether or not modified by the term “about”, the claims include equivalents to the quantities.
  • actives or “percent actives” or “percent by weight actives” or “actives concentration” are used interchangeably herein and refers to the concentration of those ingredients involved in cleaning expressed as a percentage minus inert ingredients such as water or salts.
  • the term “cleaning” refers to a method used to facilitate or aid in soil removal, bleaching, microbial population reduction, rinsing, and any combination thereof.
  • the term “microorganism” refers to any noncellular or unicellular (including colonial) organism. Microorganisms include all prokaryotes. Microorganisms include bacteria (including cyanobacteria), spores, lichens, fungi, protozoa, virinos, viroids, viruses, phages, and some algae. As used herein, the term “microbe” is synonymous with microorganism.
  • laundry refers to items or articles that are cleaned in a laundry washing machine.
  • laundry refers to any item or article made from or including textile materials, woven fabrics, non-woven fabrics, and knitted fabrics.
  • the textile materials can include natural or synthetic fibers such as silk fibers, linen fibers, cotton fibers, polyester fibers, polyamide fibers such as nylon, acrylic fibers, acetate fibers, and blends thereof including cotton and polyester blends.
  • the fibers can be treated or untreated. Exemplary treated fibers include those treated for flame retardancy. It should be understood that the term “linen” is often used to describe certain types of laundry items including bed sheets, pillowcases, towels, table linen, tablecloth, bar mops and uniforms.
  • linen refers to items or articles that are cleaned in a laundry washing machine.
  • linen refers to any item or article made from or including textile materials, woven fabrics, non-woven fabrics, and knitted fabrics.
  • the textile materials can include natural or synthetic fibers such as silk fibers, linen fibers, cotton fibers, polyester fibers, polyamide fibers such as nylon, acrylic fibers, acetate fibers, and blends thereof including cotton and polyester blends.
  • the fibers can be treated or untreated. Exemplary treated fibers include those treated for flame retardancy. It should be understood that the term "linen” is often used to describe certain types of linen items including bed sheets, pillowcases, towels, table linen, tablecloth, bar mops and uniforms.
  • phosphate-free refers to a composition, mixture, or ingredient that does not contain a phosphate or phosphate-containing compound or to which a phosphate or phosphate-containing compound has not been added. Should a phosphate or phosphate-containing compound be present through contamination of a phosphate-free composition, mixture, or ingredients, the amount of phosphate shall be less than 0.5 wt %. More preferably, the amount of phosphate is less than 0.1 wt-%, and most preferably, the amount of phosphate is less than 0.01 wt %. In an aspect, the laundry booster compositions are phosphate-free and contain 0 wt-% phosphate.
  • the term "phosphorus-free" refers to a composition, mixture, or ingredient that does not contain phosphorus or a phosphorus-containing compound or to which phosphorus or a phosphorus-containing compound has not been added. Should phosphorus or a phosphorus-containing compound be present through contamination of a phosphorus-free composition, mixture, or ingredients, the amount of phosphorus shall be less than 0.5 wt %. More preferably, the amount of phosphorus is less than 0.1 wt-%, and most preferably the amount of phosphorus is less than 0.01 wt %. In an aspect, the laundry booster compositions are phosphorus-free and contain 0 wt-% phosphorus.
  • soft surface refers to a resilient cleanable substrate, for example materials made from woven, nonwoven or knit textiles, leather, rubber or flexible plastics including fabrics (for example surgical garments, draperies, bed linens, bandages, etc.), carpet, transportation vehicle seating and interior components and the like.
  • oil refers to polar or non-polar organic or inorganic substances including, but not limited to carbohydrates, proteins, fats, oils and the like. These substances may be present in their organic state or complexed to a metal to form an inorganic complex.
  • the term “stain” refers to a polar or non-polar substance which may or may not contain particulate matter such as metal oxides, metal hydroxides, metal oxidehydroxides, clays, sand, dust, natural matter, carbon black, graphite and the like
  • the term “substantially free” refers to compositions completely lacking the component or having such a small amount of the component that the component does not affect the performance of the composition.
  • the component may be present as an impurity or as a contaminant and shall be less than 0.5 wt-%. In another embodiment, the amount of the component is less than 0.1 wt-% and in yet another embodiment, the amount of component is less than 0.01 wt-%.
  • substantially similar cleaning performance refers generally to achievement by a substitute cleaning product or substitute cleaning system of generally the same degree (or at least not a significantly lesser degree) of cleanliness or with generally the same expenditure (or at least not a significantly lesser expenditure) of effort, or both.
  • weight percent refers to the concentration of a substance as the weight of that substance divided by the total weight of the composition and multiplied by 100. It is understood that, as used here, “percent,” “%,” and the like are intended to be synonymous with “weight percent,” “wt-%,” etc.
  • the methods, systems, and compositions may comprise, consist essentially of, or consist of the components and ingredients as well as other ingredients described herein.
  • consisting essentially of means that the methods, systems, and compositions may include additional steps, components or ingredients, but only if the additional steps, components or ingredients do not materially alter the basic and novel characteristics of the claimed methods, systems, and compositions.
  • the term “configured” describes a system, apparatus, or other structure that is constructed or configured to perform a particular task or adopt a particular configuration.
  • the term “configured” can be used interchangeably with other similar phrases such as arranged and configured, constructed and arranged, adapted and configured, adapted, constructed, manufactured and arranged, and the like.
  • the laundry booster compositions and methods disclosed herein are suitable for improving laundry applications and performance.
  • the compositions and methods disclosed herein are suitable for controlling water hardness and transition metal contaminants to improve quality throughout the laundry process, including for example improved detergency, improved bleaching and wastewater operations that are phosphorus- free.
  • the use of the phosphorous- free laundry booster compositions controls the detrimental presence of transition metal contaminants in water sources employed throughout a laundry application.
  • the laundry booster compositions are suitable for use in conditioning water sources and soils contaminating a laundry process.
  • the laundry booster compositions and methods of use thereof control transition metal contaminants throughout the laundry process.
  • transition metal contaminants can be introduced through multiple sources, which conventional detergents do not fully overcome.
  • the laundry process includes an initial wash process utilizing transition metal contaminated water supplied to the washer.
  • the laundry process comprises an initial wash process utilizing transition metal contaminated soils or laundry supplied to the washer.
  • the laundry process comprises a steaming or direct steam injection contaminated with transition metals to heat waters utilized in the laundry process.
  • a laundry process includes one or more of these steps which can detrimentally introduce metal contaminants into a laundry process.
  • the dosing of the laundry booster composition can be provided to one or more inputs of the laundry process.
  • the laundry booster composition is dosed into a washing machine in a wash cycle.
  • the dosing rates of the laundry booster compositions can vary based upon the degree of water hardness and metal contamination of the laundry process.
  • contamination can be measured by the presence of one or more of iron, copper and/or manganese.
  • contamination can also be measured by the presence of one of more of alkaline earth metals, such as calcium and magnesium which are common contaminants in water hardness.
  • the contamination is preferably measured by the presence of iron.
  • the contamination can be measured by the presence of at least 0.
  • an initial step of the methods disclosed herein can optionally comprise a measuring or detecting step, or a means for detecting, to determine contamination with any contaminants, such as water hardness and/or transition metals and optionally alkaline earth metals.
  • the dosing of the laundry booster composition is provided at a rate of about 0.5 to about 30 fluid ounces (about 14.79 mL to about 887.1 mL) per 100 pounds of linen, about 3 to about 30 fluid ounces (about 88.71 mL to about 887.1 mL) per 100 pounds of linen, about 5 to about 30 fluid ounces (about 147.9 mL to about 887.1 mL) per 100 pounds of linen, about 10 to about 30 fluid ounces (about 295.8 mL to about 887.1 mL) per 100 pounds of linen, about 5 to about 25 fluid ounces (about 147.9 mL to about 739.5 mL) per 100 pounds of linen, or about 5 to about 20 fluid ounces (about 147.9 mL to about 591.6 mL) per 100 pounds of linen.
  • the dosing of the laundry booster composition is provided at a rate to control transition metals contained at a concentration of at least about 0.
  • the dosing of the laundry booster composition is provided at a rate of about 0. 1 to about 5 grams/L, or preferably about 0.5 to about 1 grams/L of solution of the laundry booster composition.
  • the laundry booster composition control iron and other metals (including both transition metals and alkaline earth metals) across all stages or steps of the laundry process.
  • the laundry booster compositions unexpectedly achieve the same stability (z.e. survivability or the ability of chelants to survive in the pH range while continuing to capture the transition metals) due to the combination of the gluconate chelant (particularly suitable for high pH), and carboxylate polymers (particularly suitable for oxidizing conditions).
  • the laundry booster composition beneficially controls the iron and other metal contaminants at a pH between about 5 to about 12, or preferably from about 6 to about 12 providing efficacy over acid, neutral and alkaline pHs.
  • the dosing of the laundry booster composition takes place before, simultaneously with, or after an initial alkaline detergent step (also referred to as a break step) in a laundry process.
  • the dosing of the laundry booster composition takes place after the alkaline detergent step in a laundry process.
  • the dosing of the laundry booster composition takes place simultaneously with an alkaline detergent wash step in a laundry process.
  • the dosing of the laundry booster composition takes place before, simultaneously with, or after a bleaching (and/or oxidizing) step in a laundry process.
  • the dosing of the laundry booster composition takes place before a bleaching (or oxidizing) step in a laundry process.
  • treatment of a laundry bleach and/or oxidizing bath is complex in that transition metals and turbidity need to be managed to optimize bleaching efficiency, presenting additional challenges.
  • the dosing of the laundry booster composition takes place before, simultaneously with, or after a sour step in a laundry process. In a preferred embodiment, the dosing of the laundry booster composition takes place before a sour step in a laundry process.
  • the dosing of the laundry booster composition takes place in a laundry system having a direct steam injection having increased contamination as a result of the heating system.
  • the methods of using the laundry booster compositions according to the embodiments provide additional benefits, including improved cleaning results on various linens and surfaces, and enhanced removal of stains.
  • laundry booster compositions are shown in Table 1 in weight percentage of a concentrate liquid composition.
  • Laundry compositions are generally referred to as a liquid concentrates as they are further diluted upon dosing to a laundry application where additional water is present to dilute the concentrate composition.
  • the laundry booster compositions may include concentrate compositions or may be diluted to form use compositions.
  • a concentrate refers to a composition that is intended to be diluted with water to provide a use solution that contacts an object to provide the desired cleaning, rinsing, or the like.
  • the laundry booster composition that contacts the water to be treated to control water hardness and transition metal contaminants can be referred to as a concentrate or a use composition (or use solution) dependent upon the formulation employed in methods.
  • a use solution may be prepared from the concentrate by diluting the concentrate with water at a dilution ratio that provides a use solution having desired laundry booster properties.
  • the water that is used to dilute the concentrate to form the use composition can be referred to as water of dilution or a diluent, and can vary from one location to another.
  • the typical dilution factor is between approximately 1 and approximately 10,000 but will depend on factors including concentration of transition metal contaminants and the like.
  • the concentrate is diluted at a ratio of between about 1:10 and about 1:10,000 concentrate to water.
  • the concentrate is diluted at a ratio of between about 1:10 and about 1:1,000 concentrate to water. More particularly, the concentrate is diluted at a ratio of between about 1:10 and about 1:100 concentrate to water.
  • laundry booster compositions beneficially provide soil suspension and removal
  • the laundry booster compositions complex ions of heavy metals and calcium to provide the whitening and color retention on treated surfaces. Moreover, the laundry booster compositions counteract the increase in weight on treated surfaces due to deposits, which beneficially prevents a change in the textile feel, protects against graying and also prevents a superimposition of dirt and thus poorer removal.
  • the laundry booster compositions are not detergent compositions as they do not contain surfactants.
  • the laundry booster compositions comprise, consist of and/or consist essentially of a gluconate chelant, a carboxylate polymer, and water, wherein the compositions are phosphorus-free.
  • the laundry booster compositions comprise, consist of and/or consist essentially of a gluconate chelant, a carboxylate polymer, water, and additional functional ingredient(s), wherein the compositions are phosphorus- free.
  • the laundry booster compositions include a gluconate chelant, including a gluconate salt or gluconic acid chelant.
  • Gluconic acids can be employed but do not provide a 100% active compound.
  • Gluconate salts can also be employed.
  • the gluconate salt chelant is sodium gluconate.
  • sodium gluconate provides a benefit in having a greater affinity to the transition metals iron and copper, and moreover provides a 100% active compound for including in the laundry booster compositions.
  • Sodium gluconate can optionally be combined with additional chelants.
  • the additional chelants are selected as having preferred affinity for additional transition metal contaminants and/or traditional water hardness ions.
  • the gluconic acid or sodium gluconate (or other salt form) chelant is effective for treating the majority of the heavy or transition metal contaminant concentrations and does not require combination with a secondary chelant. In some embodiments no additional chelant is included in the laundry booster composition.
  • the use of the gluconate chelant as the strong phosphorus-free chelant provides the environmental benefits as described herein as well.
  • the compositions include from about 15 wt-% to about 40 wt-% gluconic acid chelant, from about 15 wt-% to about 30 wt-% gluconic acid chelant, from about 20 wt-% to about 30 wt-% gluconic acid chelant, or preferably from about 25 wt-% to about 30 wt-% gluconic acid chelant.
  • the compositions include from about 15 wt-% to about 40 wt-% gluconate salt chelant, from about 15 wt-% to about 30 wt-% gluconate salt chelant, from about 20 wt-% to about 30 wt-% gluconate salt chelant, or preferably from about 25 wt-% to about 30 wt-% gluconate salt chelant.
  • all ranges recited are inclusive of the numbers defining the range and include each integer within the defined range.
  • the laundry booster compositions include a carboxylate polymer.
  • Carboxylate polymers which include polymers or copolymers of acrylic acid or maleic acid, and further includes substituted or functionalized analogs of the same.
  • the carboxylate polymer is a polyacrylate polymer, including polyacrylic acid polymers, preferably low molecular weight acrylate polymers.
  • Polyacrylic acid homopolymers can contain a polymerization unit derived from the monomer selected from the group consisting of acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, iso-butyl acrylate, isobutyl methacrylate, iso-octyl acrylate, iso-octyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, glycidyl acrylate, glycidyl methacrylate, hydroxy ethyl acrylate, hydroxypropyl acrylate, 2-hydroxy ethyl acrylate, 2-hydroxy ethyl acrylate,
  • Acrylic acid polymer Poly(acrylic acid); Propenoic acid polymer; PAA have the following structural formula: where n is any integer.
  • polyacrylates useful for the compositions
  • Acusol 445 series from The Dow Chemical Company, Wilmington Delaware, USA, including, for example, Acusol® 445 (acrylic acid polymer, 48% total solids) (4500 MW), Acusol® 445N (sodium acrylate homopolymer, 45% total solids)(4500MW), and Acusol®445ND (powdered sodium acrylate homopolymer, 93% total solids)(4500MW)
  • Other polyacrylates (polyacrylic acid homopolymers) commercially available from Dow Chemical Company suitable for the compositions include, but are not limited to Acusol 929 (10,000 MW) and Acumer 1510.
  • polyacrylic acid is AQUATREAT AR-6 (100,000 MW) from AkzoNobel.
  • suitable polyacrylates polyacrylic acid homopolymers
  • suitable polyacrylates include, but are not limited to those obtained from additional suppliers such as Aldrich Chemicals, Milwaukee, Wis., and ACROS Organics and Fine Chemicals, Pittsburg, Pa, BASF Corporation and SNF Inc. Additional disclosure of poly acrylates suitable for use in the solid rinse aid compositions is disclosed in U.S. Application Serial No. 62,043,572 which is herein incorporated by reference in its entirety.
  • Polymaleic acid (C4H2O3)x polymers or hydrolyzed polymaleic anhydride or cis-2- butenedioic acid homopolymer has the structural formula: where n and m are any integer.
  • Preferred polymaleic acid polymers which may be used for the compositions those with a molecular weight of about 400-800.
  • Commercially available polymaleic acids include the Belclene 200 series of maleic acid homopolymers.
  • the carboxylate polymers used in the laundry booster compositions are phosphorus- free and provide the best performance for phosphorus-free water hardness (as shown in examples by calcium binding capacity) control in laundry applications.
  • the compositions include from about 25 wt-% to about 50 wt-% carboxylate polymer, from about 30 wt-% to about 50 wt-% carboxylate polymer, from about 35 wt-% to about 50 wt-% carboxylate polymer, from about 35 wt-% to about 45 wt-% carboxylate polymer, or from about 40 wt-% to about 50 wt-% carboxylate polymer.
  • all ranges recited are inclusive of the numbers defining the range and include each integer within the defined range.
  • the laundry booster compositions can be provided as liquid compositions containing water.
  • the water source employed should be free of transition metals so as not to introduce any contaminants into the laundry process.
  • the compositions include from about 20 wt-% to about 50 wt-% water, from about 20 wt-% to about 40 wt-% water, from about 20 wt-% to about 35 wt-% water, or preferably from about 25 wt-% to about 35 wt- % water.
  • all ranges recited are inclusive of the numbers defining the range and include each integer within the defined range. As one skilled in the art will ascertain the concentration of water in the laundry booster compositions can be adjusted to provide concentrate compositions and/or solid compositions.
  • the components of the laundry booster compositions can further be combined with various functional components suitable for use in laundry applications.
  • the laundry booster compositions including the gluconate chelants, polymer and water which make up a large amount, or even substantially all of the total weight of the composition.
  • few or no additional functional ingredients are disposed therein.
  • additional functional ingredients may be included in the compositions.
  • the functional ingredients provide desired properties and functionalities to the compositions.
  • the term "functional ingredient” includes a material that when dispersed or dissolved in a use and/or concentrate solution, such as an aqueous solution, provides a beneficial property in a particular use.
  • the compositions do not include phosphonates. In further preferred embodiments, the compositions do not include additional chelants. In further preferred embodiments, the compositions do not include a di ethylenetriaminepentaacetic acid chelant.
  • the compositions may include an additional chelant, antiredeposition agents, bleaching agents, solubility modifiers, dispersants, metal protecting agents, stabilizing agents, corrosion inhibitors, fragrances and/or dyes, alkalinity sources, rheology modifiers or thickeners, hydrotropes or couplers, buffers, solvents and the like.
  • the compositions may include additional pH modifiers, including alkalinity agents, such as for example, hydroxides, carbonates, silicates, and the like.
  • the additional functional ingredients are phosphorus-free.
  • the compositions include up to 20 wt-%, up to 15 wt-%, up to 10 wt-%, or up to 5 wt-% additional functional ingredient(s).
  • the booster compositions include from about 0-20 wt-% additional functional ingredient(s), 0-15 wt-% additional functional ingredient(s), 0-10 wt-% additional functional ingredient(s), or 0-5 wt-% additional functional ingredient(s).
  • all ranges recited are inclusive of the numbers defining the range and include each integer within the defined range.
  • the laundry booster compositions do not require but can optionally include at least one additional chelant.
  • Chelants include chelating agents (chelators), sequestering agents (sequestrants), builders, and the like.
  • chelants include, but are not limited to, phosphonates, phosphates, aminocarboxylates and their derivatives, pyrophosphates, polyphosphates, ethylenediamine and ethylenetriamine derivatives, hydroxyacids, and mono-, di-, and tri-carboxylates and their corresponding acids.
  • Other exemplary chelants include aluminosilicates, nitroloacetates and their derivatives, and mixtures thereof.
  • Still other exemplary chelants include aminocarboxylates, including salts of methyl glycine diacetic acid (MGDA, commercially available as Trilon M), ethylenediaminetetraacetic acid (EDTA) (including tetra sodium EDTA), hydroxy ethylenediaminetetraacetic acid (HEDTA), and diethylenetriaminepentaacetic acid (DTP A).
  • MGDA methyl glycine diacetic acid
  • EDTA ethylenediaminetetraacetic acid
  • HEDTA hydroxy ethylenediaminetetraacetic acid
  • DTP A diethylenetriaminepentaacetic acid
  • Chelants can be water soluble, and/or biodegradable.
  • exemplary chelants include TKPP (tetrapotassium pyrophosphate), PAA (polyacrylic acid) and its salts, phosphonobutane carboxylic acid, Alanine, N,N- bis(carboxymethyl)-, trisodium salt, and sodium gluconate. As described herein, only phosphorus -free chelants are suitable for use with the laundry booster composition.
  • Additional chelants include amino poly carboxylates, including but not limited to diethylene triamine pentaacetate, diethylene triamine penta(methyl phosphonic acid), ethylene diamine-N'N'-disuccinic acid, ethylene diamine tetraacetate, ethylene diamine tetra(methylene phosphonic acid) and hydroxy ethane di(methylene phosphonic acid).
  • amino poly carboxylates including but not limited to diethylene triamine pentaacetate, diethylene triamine penta(methyl phosphonic acid), ethylene diamine-N'N'-disuccinic acid, ethylene diamine tetraacetate, ethylene diamine tetra(methylene phosphonic acid) and hydroxy ethane di(methylene phosphonic acid).
  • the chelating agent is a biodegradable aminopoly carboxylate such as glutamic acid (GLDA), methylglycinediacetic acid (MGDA), L-aspartic acid N,N-diacetic acid tetrasodium salt (ASDA), DEG/HEIDA (sodium diethanolglycine/2- hydroxy ethyliminodiacetic acid, disodium salt), iminodisuccinic acid and salts (IDS), and ethylenediaminedisuccinic acid and salts (EDDS).
  • GLDA glutamic acid
  • MGDA methylglycinediacetic acid
  • ASDA L-aspartic acid N,N-diacetic acid tetrasodium salt
  • DEG/HEIDA sodium diethanolglycine/2- hydroxy ethyliminodiacetic acid, disodium salt
  • IDS iminodisuccinic acid and salts
  • EDDS ethylenediaminedisuccinic
  • the additional one or more chelant(s) is substantially free of phosphorus. In more preferred embodiments, the additional one or more chelants is free of phosphorus.
  • the chelant is a sodium salt of aminocarboxylates. More preferably, the chelant is methyl glycine diacetic acid.
  • the compositions include from about 0 wt-% to about 10 wt-% additional chelant, from about 0 wt-% to about 5 wt-% additional chelant, or from about 1 wt-% to about 10 wt-% additional chelant, or from about 1 wt-% to about 5 wt-% additional chelant.
  • all ranges recited are inclusive of the numbers defining the range and include each integer within the defined range.
  • a method for treating laundry comprising: contacting the laundry with a laundry booster composition comprising a gluconate chelant, a carboxylate polymer and water; wherein the laundry booster composition is phosphorus-free, controls water hardness and metal contaminants throughout the laundry process, and provides enhanced whiteness of the treated laundry, and wherein the laundry booster compositions follows an initial wash process where the laundry is contaminated with metals and/or water supplied to the washer is hard water and/or is contaminated with metals.
  • gluconate chelant is a gluconate salt or gluconic acid.
  • laundry booster composition further comprises an aminocarboxylate chelant.
  • laundry booster composition consists of the gluconate chelant, the carboxylate polymer and water.
  • a liquid laundry booster composition comprising: from about 15 wt-% to about 40 wt-% of a gluconate chelant; from about 25 wt-% to about 50 wt-% of a carboxylate polymer; and from about 20 wt-% to about 50 wt-% of water, wherein the composition is phosphorus-free.
  • composition of aspect 12, wherein the gluconate chelant is sodium gluconate or gluconic acid.
  • composition of any one of aspects 12-14, further comprising an aminocarboxylate chelant is provided.
  • composition of aspect 15, wherein the aminocarboxylate chelant is methyl glycine diacetic acid.
  • gluconate chelant comprises from about 15 wt-% to about 30 wt-% of the composition
  • carboxylate polymer comprises from about 30 wt-% to about 50 wt-% of the composition
  • water comprises from about 20 wt-% to about 40 wt-% of the composition.
  • a liquid laundry booster composition consisting of: from about 15 wt-% to about 40 wt-% of a gluconate chelant; from about 25 wt-% to about 50 wt-% of a carboxylate polymer; and from about 20 wt-% to about 50 wt-% of water, wherein the composition is phosphorus-free.
  • Basic whiteness value refers to a reflectance value calculated a spectrophotometer. Y-value indicates the degree of whiteness after the UV component of the light source has been filtered out and the brightening effect on the clean laundry has been erased. The Y-value is important for detecting graying, discoloration, color carryover or other textile changes. In general, the Y-value of 87 should not be fallen short of after 50 wash cycles.
  • the document RAL Sachgemafie Wascherati - Gutetechnisch RAL-GZ992, May 2019, German Institute for Quality Assurance and Certification e. V. defines the Y- value and its measurement. The document also refers to DIN 5033. The Y-value is measured directly with Spectrophotometer CM-3610A from KONICA MINOLTA.
  • Tables 4A and 4B show the results of a secondary wash test on a large washing machine in the presence of a mixture of heavy metals comparing Formulas 5-6 disclosed in Table 3 A with the benchmark controls.
  • the Y-values (whiteness) was measured after 25 wash cycles with the evaluated formulas.
  • the washing method, water hardness, water quantity and temperatures were programmed according to the requirements of the Schulthes washing machines.
  • the evaluated product (Formula 5 or 6, or Benchmark 1 or 2) was weighed on the laboratory scale and placed in the detergent container of the washing machine.
  • the standard program has 3 rinse baths as well as 1 intermediate and 1-end spin.
  • the secondary washing procedures are performed on 4-wash machines. Once the 25-wash cycles are completed the control fabrics and evaluated fabrics are ironed.
  • Formula 6 is approximately on the same level as of Benchmark 1 (and Formula 5 is approaching that of the Benchmark 1 (and exceeds Benchmark 2)) while also providing the benefits of being phosphate-free. Both Formulas 5 and 6 show the best result (equal level) in terms of whiteness for mixed fabric 610.
  • Benchmark 3 is a composition according to example 6 of WO2019/005940 Al.
  • Example 2 Additional Hempshire testing as outlined in Example 2 was completed to compare the Benchmarks 1 and 2 along with Formula 6 to Benchmark 4 as shown in Table 6 in terms of calcium (Ca) complexing.
  • Example 3 The methodology of Example 3 was utilized to assess the Y-values (whiteness) on cotton fabrics comparing Control Benchmark 3 (shown above in Table 5) to the evaluated Formula 6. The methods assess washing under pressured conditions including high addition of heavy metals, in particular iron. Again the Y-value was determined according to DIN 5033 (German Institute for Standardization). [0125] TABLE 7
  • the Hempshire method of Example 2 was utilized to assess Calcium complexing capacity with the following methods to determining the sequestering power of Fe 3+ .
  • the ferric solution is obtained by dissolving 86.3 g of Ammonium iron(III) sulfate dodecahydrate NH4Fe(SO4)2 x I2H2O Merck 3776 in 1000 ml distilled water.
  • FIG. 6 shows the graphical results of the sequestering capability of Fe 3+ / Cu 2+ (mg).
  • laundry booster composition controls water hardness and metal contaminates, namely controls the water in the initial wash process that is hard water and/or water contaminated with metals. This further demonstrates how the enhanced whiteness in laundry is achieved.

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Abstract

Procédés et des compositions pour améliorer la blancheur du linge grâce à l'utilisation de compositions de renforcement sans phosphore pour diminuer la dureté de l'eau et la concentration de métaux lourds. Les compositions de renforcement exemptes de phosphore sont des agents de traitement de l'eau et leurs procédés d'utilisation fournissent de l'eau de lavage de haute qualité qui a une faible dureté de l'eau et commande des métaux lourds pour une blancheur textile améliorée.
PCT/US2022/042288 2021-09-01 2022-09-01 Agent de traitement de l'eau exempt de phosphore pour des applications de blanchisserie WO2023034469A1 (fr)

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Citations (3)

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WO2013077980A2 (fr) * 2011-11-03 2013-05-30 Ecolab Usa Inc. Compositions acides de blanchisserie durables avec contrôle du fer
US20180371380A1 (en) 2017-06-27 2018-12-27 Ecolab Usa Inc. Non-phosphorous transition metal control in laundry applications
WO2020176565A1 (fr) * 2019-02-28 2020-09-03 Ecolab Usa Inc. Système de stabilisation pour émulsions de blanchisserie

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WO2013077980A2 (fr) * 2011-11-03 2013-05-30 Ecolab Usa Inc. Compositions acides de blanchisserie durables avec contrôle du fer
US10927328B2 (en) * 2011-11-03 2021-02-23 Ecolab Usa Inc. Sustainable laundry sour compositions with iron control
US20180371380A1 (en) 2017-06-27 2018-12-27 Ecolab Usa Inc. Non-phosphorous transition metal control in laundry applications
WO2019005940A1 (fr) 2017-06-27 2019-01-03 Ecolab Usa Inc. Élimination des métaux de transition non phosphoreux dans des applications de lavage du linge
WO2020176565A1 (fr) * 2019-02-28 2020-09-03 Ecolab Usa Inc. Système de stabilisation pour émulsions de blanchisserie

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